# KMGM vs ooobook

The clearest difference is update cadence: ooobook at daily against KMGM's every 17 months. KMGM's advantage is iOS requirement (12.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

KMGM ships an update every 17 months, ooobook daily. Both last shipped on October 3, 2026.

## The numbers

| Metric | KMGM | ooobook |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 17 months | **Daily** |
| Size | 13 MB | 41 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [seongil Hwang](https://appshunter.io/developer/1762017708) | [Byungwook Youn](https://appshunter.io/developer/1895686340) |

## What reviewers say

### KMGM

[App page](https://appshunter.io/ios/app/kmgm/id6621263729)

**Features:** macOS Compatibility

**In-app purchases:** none


### ooobook

[App page](https://appshunter.io/ios/app/ooobook/id6764209971)

**In-app purchases:** none


## Frequently asked questions

### Is KMGM free?

KMGM is free to download, with no in-app purchases.

### Is ooobook free?

ooobook is free to download, with no in-app purchases.

### Do KMGM or ooobook have ads?

Neither KMGM nor ooobook shows ads.

### Which is updated more often, KMGM or ooobook?

KMGM ships an update every 17 months, and ooobook daily. Most recently, KMGM was updated on October 3, 2026 and ooobook on October 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*